<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
hello world!

<p>一行文字</p>
<span>一行文字</span>
<!--p 标签与 span 标签都区别之一就是，p 标签的含义是：段落。而 span 标签责没有独特的含义。-->

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<a href="https://blog.csdn.net/eeeecw/article/details/80591511" target="_blank" >什么是HTML语义化标签</a>
</body>
</html>